Hoshino was traumatized by the fact that a criminal he had caught in an undercover operation in the past was falsely accused, but he decided to become a decoy in order to overcome his past self. He disguises himself and rides the same train every day, but he is made sexual prey by perverted men, gang-raped to pulp, and becomes an outlet for the sexual desires of perverts! He is divided into a wall, a photographer, and a pervert, and becomes the prey of a clever surrounding pervert using aphrodisiacs! In a closed space (train), he is deprived of his freedom, restrained, deep-throated, gang-raped... the devilish deeds are performed...